SBR blended NR upper with cotton canvas lining|Highly chemical-resistant rubber upper|30% concentration Sodium Cyanide resistant >480 minutes|Circular saw cut resistance|15" in height, 3" nylon cuff with adjustable toggle to keep debris out |Only 3% of degradation after immersed in cement for 70 hours|Reinforced achilles protection|Kick off spur|Abrasion-, oil-, chemical-, heat-, and slip-resistant, and air cushioned NBR lug sole|Protection against slipping into rebar; preventing bruising, lacerating of the shin/ankle|Slip-resistant soles resistant to 300˚C/572˚F hot contact|Snug-fit design to reduce foot fatigue and ankle rollover|Ultra flexible: Exceeds 305,000 Flex Rating|Compatible with ice studs